Tag Archives: Neonics

Honeybees Are and Have Been Thriving

09 Thursday Jun 2022

Posted by in Agriculture

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It’s been a while since I’ve heard much about the “beepocalypse”, but apparently many remain under the misapprehension that honeybee populations have languished under the threat of modern farming techniques. Some recent fake news on that subject appears at this link. There are two related contentions here, and both are false. One is that honeybee populations are dwindling. The other is the claim that productivity-enhancing insecticides used in modern agriculture are killing bees.

Bill Wirtz of the Brussels-based Consumer Choice Center notes the following:

“… looking at the statistics of the Food and Agriculture Organization of the United Nations, beehives are on the rise worldwide. The data show that as of 2020, there has been an increase of beehives by 17% since 2010, 35% since 2000, and 90% since 1961.”

He also points out that efforts to prove the wild bee population in the U.S. declined over the five years ending in 2013 were based on a model laden with assumptions, as opposed to actual statistics. In any case, even if it had been true, a five-year period is hardly proof of a secular decline. Both wild and managed bee populations go through cycles based on natural conditions, and in the case of managed bees, conditions in the market for honey. In fact, high honey prices could favor growth ahead in managed bee populations, though cost factors make that less certain.

As for the insecticides widely blamed for the beepocalypse, there is no real world, field-level evidence of any link to declining bee populations. In a separate article, Wirtz cites reports from the U.S. EPA and agencies in Canada and Australia finding that the widely-blamed neonicotinoids could not be linked to harms to bee colonies. This study found that “neonics” had no lethal or “sublethal” effects on honeybees at field-level dosages, despite reports of such effects in the lab. The lab work cited sort of reminds me of the outrageous tests that led to the saccharine scare of the 1970s, when the saccharine-equivalent of 800 sugar-free soft drinks a day was fed to lab rats. Dose dependence means everything under actual field conditions.

Randy Oliver of ScientificBeekeeping.com has written several thorough analyses of the impact of neonics on bees over the years. In 2012, he posted an important article entitled “The Extinction of the Honeybee?”, in which he reported that “… honeybees were thriving at Ground Zero of neonicitinoid use”. Neonics have definite advantages relative to older pesticides: they are much safer for humans, they are more effective at targeting insects that bore and suck sap, and they can be used as seed treatments with less leaching into the surrounding environment relative to sprays.

Oliver followed that up his first piece with two companion articles in which he documented issues related to regulation, testing regimes, the field applicability of tests, problems in methodology, and interpretation of results. He identified seed planting dust as a serious problem for bees, but one that is easily managed. In the second post, Oliver evaluated a number of characteristics of bee and colony health, including learning performance, orientation, foraging, immune function, social interaction, task allocation, and effects upon brood. He summarized his review thusly (his emphasis):

“Any number of scientists have diligently tried to find any sorts of sublethal effects of neonics on bees, but have failed to demonstrate adverse effects at the colony level at doses produced by seed.”

At the last link, Oliver discusses specific issues with respect to different crops, as well as other potential harms of neonics. However, seed treatments have never been implicated by researchers in bee colony collapse.

Finally, from a more recent presentation, Oliver reviews the history of bee population numbers and factors that drove them. That included infestation by two different parasitic mites in the 1980s and another pathogen in the early 2000s. These invasive waves led to use of the term Colony Collapse Disorder. While neonics had nothing to do with it, there were claims that it did. Oliver is not shy about noting other problems he identifies with the use of neonics, and he is strongly in favor of pest management approaches that rely less on pesticides. This is partly because farmers recognize the consumer resistance to pesticides, rational or otherwise. When neonics are applied properly, however, bee colony collapse is not one of those problems.

Honey prices were up strongly in 2021 (see here) and have remained strong in 2022 (here). That would bode well for the managed bee population. However, costs have increased sharply as well, blunting beekeeper incentives. Suppliers of beekeeping equipment are also facing higher costs. Given these pressures, it’s not clear whether the managed bee population will expand this year, but there is no threat to the long-term health of the bees in the proper use of neonics.

Beepocamyth: Neonics Don’t Kill the Buzz

08 Saturday Feb 2020

Posted by in Agriculture, Biodiversity, Environment, Risk

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False claims that a certain class of pesticides threaten the world’s bee populations are commonplace, and we hear the same more recently about various species of birds. The origins of the “beepocalypse” rumor were not based on scientific evidence, but on a narrative that developed among environmental activists in response to a phenomenon called Colony Collapse Disorder (CCD) that began around 2006, roughly a decade after neonicotinoid pesticides (so-called neonics) replaced earlier, more toxic compounds as the pesticides of choice. But Jon Entine writes at The Genetic Literacy Project:

“What causes CCD? It still remains a mystery, in part. But researchers turned up historical examples of CCD-like bee die offs across the globe over hundreds of years, well before the introduction of pesticides, but activist groups would have none of it.”

CCD essentially tapered off by 2009, according to Entine, and the number of honeybee colonies are higher now that before the introduction of neonics. See Entine’s charts at the link showing changes in honeybee populations over time. In Australia, where the use of neonics has been especially heavy, bee populations have grown steadily and remain quite healthy.

Entine’s article provides a nice summary of the real and imagined threats to the world’s bee populations as well as distorted claims associated with normal winter die-offs. He provides a number of useful links on these subjects, and he summarizes research showing the lack of any real threat to bees from neonics:

“Over the past seven years, there have been a flood of studies about the potential impact of neonics on bees. Many small-scale, forced-feeding studies that generally overdosed bees with neonics found various negative effects; not a surprise, many entomologists have said, as they do not replicate real world impacts.

In contrast, a multitude of large-population field studies—the ‘gold-standard’ of bee research—have consistently demonstrated there are no serious adverse effects of neonic insecticides on honeybees at the colony level from field-realistic neonic exposure. …

By last year, even the Sierra Club—for years one of the leading proponents of the honeybee Armageddon narrative—was backpeddling, writing: ‘Honeybees are at no risk of dying off. While diseases, parasites and other threats are certainly real problems for beekeepers, the total number of managed honeybees worldwide has risen 45% over the last half century.'”

Then Entine turns his attention to another front in the war on pesticides: a Canadian study in which white-crowned sparrows were force-fed a mixture of seeds and pesticide via gavage — ie, through a tube:

“Only sparrows force-fed the highest dosage were affected, and then only temporarily. They stopped eating, quickly lost body weight and fat, became disoriented and paused their migratory flight—all after tube full of chemicals was forced down their throat and into their stomach. … That said, within a few days of what was likely a trauma-inducing experience, all recovered completely and continued their migration normally.”

Yet the authors reported that the very existence of some wild birds is threatened by neonics, and the media, always eager to report a crisis, ran with it.

Paul Driessen also describes the junk science underlying misleading narratives regarding pesticide use. It is a driving force behind legislation in the House and Senate that would ban the use of neonics in National Wildlife Refuges, where the Fish & Wildlife Service permits farmers to grow various crops. Driessen has some advice for Rep. Nydia Velázquez (D-NY), a sponsor of the legislation:

“She should also recognize potentially serious threats to bees, wildlife, soils, waters and plants in refuges from sources that she, her colleagues and their environmentalist and media allies routinely ignore: solar panels, for instance. Not only do they blanket many thousands of acres, allowing little to grow beneath or between them. They can also leach cadmium and other metals into soils and waters. They should no longer be built near wildlife refuges.

Finally, it’s not just bees. It’s also birds, and bats – which are already being killed and even eradicated in many areas by America’s 56,000 wind turbines. Imagine what Green New Deal turbine numbers would do.”

More perspective is offered in this excellent six-part (and growing?) “Pesticides and Food” series (all at the link) by Kayleen Schreiber:

  1. Has pesticide use decreased? Yes, dramatically in per capita and per unit of output.
  2. Have pesticides improved?  Yes, with dramatically lower toxicity, improved biodegradability, and lower use rates.
  3. How dangerous is glyphosate (a herbicide)? Not very. Covered in my last post. Glyphosate is only 1/10th as toxic as caffeine.
  4. How do organic pesticides compare to synthetic pesticides? It’s a mixed bag, with great variability across both classes. Organics are more toxic in some applications, and synthetics are more toxic in others.
  5. Soil health: Are synthetic pesticides more sustainable than “natural” organics?  Organics require more tillage, which creates sustainability problems.
  6. Pesticide residues — Something to worry about? The USDA finds little residue in its testing, with extremely low detection rates for both organics and synthetics.